Based on the animated TV show. Hawkeye! The Wasp! Scarlet Witch! Wonder Man! Tigra! Ant-Man! They are the Earth's Mighiest Heroes, standing united against threats that would vanquish any single super hero! But now an experiment by Hank Pym may have unleashed a menace beyond even their ability to conquer! And when the battle is over, more than one Avenger may not rise to fight again!